Double-head pump for table type water purifier and table type water purifier

Abstract

The double-head pump has the advantages that a pressure relief structure and a pressure relief water return end are additionally arranged on a water suction pump head, and the pressure relief structure is arranged between the pressure relief water return end and a pressurizing structure and is communicated with the pressurizing structure and the pressure relief water return end when rated pressure is reached; therefore, when the booster pump head continuously works, the water suction pump head synchronously works, when the pressure of the booster structure in the water suction pump head is increased to the rated pressure of the pressure relief structure, the pressure relief structure can be opened to communicate the booster structure with the pressure relief water return end, and purified water in a fluid chamber of the water suction pump head is discharged back to the purified water container from the pressure relief water return end. Purified water produced by the booster pump head can gradually flow into the purified water container, and the booster pump head and the water suction pump head stop at the same time when the purified water container is full, that is, a water flow loop is formed between the water suction pump head and the purified water container, and internal water circulation in the water suction pump head is avoided, so that high-pressure and high-temperature conditions are avoided; and the use safety of the double-head pump and the table type water purifier is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pumps for water purifiers, and specifically relates to a dual-head pump for a tabletop water purifier and a tabletop water purifier. Background Art

[0002] With the increasing emphasis on health, water purifiers play an increasingly important role in users' daily lives. In the original water purification treatment system, due to the different working conditions of filtering water and conveying water, generally two separate diaphragm pumps are used for work, one is a booster pump and the other is a water extraction pump. Each pump is controlled by its own motor to complete the conveyance of water flow. Among them, the booster pump for water production is the core power component of the water purifier. Its main function is to increase the inlet water pressure to the pressure required by the water purification filter element and ensure a certain stable flow rate; the water extraction pump for water supply is used to extract the purified water in the water purification bag and convey it to the water outlet terminal.

[0003] The defect of the above water purification treatment system is that it consists of two pumps and two sets of electronic control systems, which brings waste of system resources. At the same time, it also makes the entire water purification treatment system large and the system cost relatively high. If an existing dual-head pump is used, since one motor is used, after the motor starts, the two pump heads must work simultaneously, and after the motor shuts down, the two pump heads also stop conveying the medium at the same time. However, due to the different conveying times and flow rates of the two media, interference phenomena will occur in the pipeline, making it difficult to complete different functions. It not only cannot meet the needs of the system, but also causes system disorders. Among them, the most urgent problem to be solved is that when the faucet at the water outlet terminal is closed and the booster pump needs to work, according to the structure of the existing dual-head pump, the water extraction pump head will also work simultaneously to extract purified water, resulting in an increase in the internal water circulation pressure of the fluid chamber of the water extraction pump head and forming continuous high temperature. The high temperature state will cause deformation of components and lead to adverse conditions such as seal failure, making the water extraction pump head unsafe and in need of improvement. Summary of the Utility Model

[0004] One technical problem to be solved by this application is to overcome the defects of the above related technologies and provide a complete dual-head pump for a tabletop water purifier and a tabletop water purifier.

[0005] The technical solution adopted by the dual-head pump for the tabletop water purifier to solve the technical problem is as follows: A dual-head pump for a tabletop water purifier includes a pump body, a water extraction pump head and a pressurization pump head respectively arranged at both ends of the pump body. A first water inlet end for communicating with a water purification container and a first water outlet end for communicating with a water outlet terminal are provided on the fluid chamber of the water extraction pump head. A pressurization structure is provided between the first water inlet end and the first water outlet end. A pressure relief structure and a pressure relief return water end are also provided on the water extraction pump head. The pressure relief structure is arranged between the pressurization structure and the pressure relief return water end and communicates the pressurization structure with the pressure relief return water end when the rated pressure is reached. The pressure relief return water end is communicated with the water purification container, and the pressure relief return water end is arranged on the fluid chamber of the water extraction pump head.

[0006] Compared with the related technology, the dual-head pump for the tabletop water purifier of the present application has the following advantages: A pressure relief structure and a pressure relief return water end are added to the water extraction pump head. The water inlet of the circulating water path is connected to the original pressurization structure, and the water outlet of the circulating water path is connected to the water purification container through the pressure relief return water end arranged on the housing of the water extraction pump head. The pressure relief structure is arranged on the circulating water path to open the circulating water path when the rated pressure is reached. Thus, when the pressurization pump head works continuously, the water extraction pump head works synchronously. When the pressure of the pressurization structure in the water extraction pump head increases to the rated pressure of the pressure relief structure, the pressure relief structure can be opened to connect the pressurization structure with the pressure relief return water end. The purified water in the water extraction pump head is discharged from the pressure relief return water end back to the water purification container, and the purified water produced by the pressurization pump head will also gradually flow into the water purification container. When the water purification container is full, the pressurization pump head and the water extraction pump head stop at the same time. That is, a water flow loop is formed between the water extraction pump head and the water purification container, and the internal water circulation in the water extraction pump head is avoided, so that the high-temperature situation will not occur, ensuring the use safety of the dual-head pump and the tabletop water purifier.

[0007] Preferably, the pressure relief structure is composed of a small top cover, an upper spring seat, a pressure relief spring, a lower spring seat, an elastic sealing plate and a nested hole in the fluid chamber of the water extraction pump head. The small top cover is fixed to the valve seat on the top cover of the water extraction pump head and presses the elastic sealing plate. The upper spring seat is plugged at the top of the spring groove in the small top cover. The lower spring seat is plugged at the bottom of the spring groove in the small top cover and is slidably matched with the spring groove. The lower spring seat abuts against the elastic sealing plate. The pressure relief spring abuts between the upper spring seat and the lower spring seat. The elastic sealing plate is hermetically connected in the valve cavity and covers the port of the nested hole to cut off the large outer hole and the small inner hole of its outer sleeve. The small inner hole of the nested hole is connected to the pressure relief return water end, and the large outer hole of the nested hole is connected to the pressurization structure. When the water pressure of the pressurization structure reaches the rated pressure of the pressure relief structure, the elastic sealing plate is disengaged from the port of the nested hole, and the large outer hole and the small inner hole are connected.

[0008] As an improvement, a threaded hole is provided at the top of the small top cover, and a pressure regulating screw is screwed into the threaded hole. The bottom end of the pressure regulating screw abuts against the upper spring seat. By adjusting the position of the upper spring seat in the spring groove of the small top cover, the axial compression distance of the pressure relief spring is adjusted, that is, the rated pressure of the pressure relief structure is adjusted.

[0009] As an improvement, a groove is provided at the bottom of the lower spring seat, and a convex block is provided at the upper end of the elastic sealing plate. The convex block is inserted into the groove. It is used to facilitate the assembly of the lower spring seat and the elastic sealing plate, so as to calibrate the installation position of the elastic sealing plate in the valve cavity and ensure the sealing effect.

[0010] The technical solution adopted by this desktop water purifier to solve the technical problem is: a desktop water purifier, which adopts the double-head pump for the desktop water purifier as described above. Description of the Drawings

[0011] Figure 1 is a perspective view of the double-head pump for the desktop water purifier of the present utility model.

[0012] Figure 2 is a top view of the double-head pump for the desktop water purifier of the present utility model.

[0013] Figure 3 is Figure 2 the schematic A-A cross-sectional view of

[0014] Figure 4 is Figure 2 the schematic B-B cross-sectional view of

[0015] Figure 5 is Figure 4 the enlarged schematic view of part C of Detailed Embodiments

[0016] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of this application, and are not intended to limit the protection scope of the embodiments of this application. Those skilled in the art can adjust them as needed to adapt to specific application scenarios.

[0017] This embodiment is a double-head pump for a desktop water purifier, as Figure 1The figure shows a pump body 1, a motor 2, and a water pump head 30 and a pressure-boosting pump head 40 respectively arranged at both ends of the pump body 1. The water pump head 30 and the pressure-boosting pump head 40 both adopt diaphragm pumps. The fluid chamber of the water pump head 30 is provided with a first water inlet end 31 for communicating with a clean water container and a first water outlet end 32 for communicating with a water outlet terminal (faucet). A pressure-boosting structure (not shown in the figure) is provided between the first water inlet end 31 and the first water outlet end 32. The pressure-boosting structure includes a water inlet cavity connected to the first water inlet end 31, a pressure-boosting cavity and a water outlet cavity connected to the first water outlet end 32. The pressure-boosting pump head 40 is provided with a second A water inlet end 41 and a second water outlet end 42, wherein the second water inlet end 41 is connected to the source water container, a pressurization structure is provided between the second water inlet end 41 and the second water outlet end 42 (not shown in the figure, which is basically the same as the pressurization structure of the water pump head 30 and will not be described in detail), and the second water outlet end 42 is connected to the RO membrane to pressurize the water in the RO membrane; a pressure relief structure 36 and a pressure relief return water end 34 are also provided on the water pump head 30, the pressure relief structure 36 is provided between the pressurization structure and the pressure relief return water end 34 and connects the pressurization structure and the pressure relief return water end 34 when the rated pressure is reached, and the pressure relief return water end 34 is connected to the clean water container.

[0018] In this embodiment, the pressure relief structure 36 is as follows: Figure 5 The figure shows that it is mainly composed of a small top cover 361, an upper spring seat 362, a pressure relief spring 363, a lower spring seat 364, an elastic sealing plate 365 and a nested hole in the fluid chamber of the water pump head 30; the small top cover 361 is fixed to the valve seat (not shown in the figure) on the top cover of the water pump head 30 and presses the elastic sealing plate 365, the upper spring seat 362 is plugged in the top of the spring groove (not shown in the figure) in the small top cover 361, the lower spring seat 364 is plugged in the bottom of the spring groove in the small top cover 361 and slidably cooperates with the spring groove, the lower spring seat 364 abuts against the elastic sealing plate 365, and the pressure relief spring 363 abuts between the upper spring seat 362 and the lower spring seat The elastic sealing plate 365 is sealed between the spring seat 364 in the valve cavity (not shown) and covers the port of the nesting hole to separate the outer sleeve large hole 352 from the inner sleeve small hole 351. The inner sleeve small hole 351 of the nesting hole is connected to the pressure relief return end 34, and the outer sleeve large hole 352 of the nesting hole is connected to the water outlet cavity of the boosting structure. When the water pressure of the boosting structure reaches the rated pressure of the pressure relief structure 36, the elastic sealing plate 365 is disengaged from the port of the nesting hole, and the outer sleeve large hole 352 is connected to the inner sleeve small hole 351, forming a pressure relief channel 35 composed of the water outlet cavity of the boosting structure, the outer sleeve large hole 352 and the inner sleeve small hole 351.

[0019] As an improvement, a threaded hole (not shown in the figure) is provided on the top of the small top cover 361 , a pressure regulating screw (not shown in the figure) is threaded into the threaded hole, and the bottom end of the pressure regulating screw abuts against the upper spring seat 362 .

[0020] A groove (not marked in the figure) is provided at the bottom of the lower spring seat 364, and a convex block (not marked in the figure) is provided at the upper end of the elastic sealing plate 365. The convex block is inserted into the groove.

[0021] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A double-head pump for a desktop water purifier, comprising a pump body and a water pump head and a pressure pump head respectively arranged at both ends of the pump body, wherein a first water inlet end for communicating with a water purification container and a first water outlet end for communicating with a water outlet terminal are arranged on a fluid chamber of the water pump head, and a pressure boosting structure is arranged between the first water inlet end and the first water outlet end; characterized in that: The water pump head is also provided with a pressure relief structure and a pressure relief return water end. The pressure relief structure is arranged between the pressure relief return water end and the pressurization structure and connects the pressurization structure and the pressure relief return water end when the rated pressure is reached. The pressure relief return water end is connected with the clean water container and is arranged on the fluid chamber of the water pump head.

2. A double-head pump for a desktop water purifier according to claim 1, characterized in that: The pressure relief structure is composed of a small top cover, an upper spring seat, a pressure relief spring, a lower spring seat, an elastic sealing plate and a nested hole in the fluid chamber of the water pump head; the small top cover is fixed to the valve seat on the top cover of the water pump head and presses the elastic sealing plate, the upper spring seat is plugged in the top of the spring groove in the small top cover, the lower spring seat is plugged in the bottom of the spring groove in the small top cover and slidably cooperates with the spring groove, the lower spring seat abuts against the elastic sealing plate, the pressure relief spring abuts between the upper spring seat and the lower spring seat, the elastic sealing plate is sealingly connected in the valve cavity and covers the port of the nested hole to separate the large hole of the outer sleeve from the small hole of the inner sleeve; the small hole of the inner sleeve of the nested hole is connected to the pressure relief return water end, and the large hole of the outer sleeve of the nested hole is connected to the boosting structure; when the water pressure of the boosting structure reaches the rated pressure of the pressure relief structure, the elastic sealing plate is disengaged from the port of the nested hole, and the large hole of the outer sleeve is connected to the small hole of the inner sleeve.

3. A double-head pump for a desktop water purifier according to claim 2, characterized in that: The top of the small top cover is provided with a threaded hole, a pressure regulating screw is threaded in the threaded hole, and the bottom end of the pressure regulating screw abuts against the upper spring seat.

4. A double-head pump for a desktop water purifier according to claim 2, characterized in that: The bottom of the lower spring seat is provided with a groove, and the upper end of the elastic sealing plate is provided with a convex block, and the convex block is inserted into the groove.

5. A desktop water purifier, characterized in that: It comprises a double-head pump for a desktop water purifier as described in any one of claims 1 to 4.

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